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A long rectangular copper bar under a tensile load P hangs from a pin that is supported by two steel posts see figure The copper bar has a length of 20 m a cross sectional area of 4800 mm2 and

A long, rectangular copper bar under a tensile load P
hangs from a pin that is supported by two steel posts (see
figure). The copper bar has a length of 2.0 m, a cross-sectional
area of 4800 mm2, and a modulus of elasticity Ec 120 GPa.
Each steel post has a height of 0.5 m, a cross-sectional area of
4500 mm2, and a modulus of elasticity Es 200 GPa.
(a) Determine the downward displacement d of the
lower end of the copper bar due to a load P 180 kN.
(b) What is the maximum permissible load Pmax if the
displacement d is limited to 1.0 mm?
 

Jun 30 2020 View more View Less

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